I can now reproduce it by hibernating two times. As the attached dmesg shows, resume after first std works fine, resume from the second std onwards results in no video output. As it may be a kernel issue, I tested it with the 3.11 saucy and the 3.12 tusty kernel. Both show the same behavior.
** Attachment added: "dmesg_3rd_resume" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1250498/+attachment/3908715/+files/dmesg_3rd_resume ** Summary changed: - haswell, X may freeze after resume + haswell, no video output after 2nd resume from suspend to disk (S4) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1250498 Title: haswell, no video output after 2nd resume from suspend to disk (S4) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1250498/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
